Summary of the invention
The purpose of this utility model provides a kind of electrical operating mechanism for switchgear, and (earthed switch in the GIS complete set of equipments of 800kV~1100kV) uses needs to satisfy large-scale ultra high voltage.
For reaching above purpose, the utility model takes following technical scheme to be achieved:
A kind of electrical operating mechanism for switchgear, comprise the mechanism rack that constitutes by panel and base plate, the mechanism rack upside is provided with auxiliary switch by bent plate is installed, be provided with main shaft and output shaft between the panel of mechanism rack and base plate, main shaft is provided with a control cam and a gear, the mechanism rack base plate is provided with motor, this motor connects said gear by a gear shaft, the control loop of this motor is provided with branch, outage travel switch SL1 closes a floodgate, SL2, divide, outage travel switch SL1 closes a floodgate, the contact of SL2 is controlled by the control cam on the main shaft, connect by a transmission device between main shaft and the output shaft, one end of output shaft extending panel is connected with auxiliary switch by connecting plate, and drives the auxiliary switch action; Output shaft stretches out output outside the base plate and is used for being connected and transmission with the switch of mechanism operation; It is characterized in that described transmission device is the device of gear and cam associating transmission.
In the such scheme, described gear and cam associating transmission device comprises an initiatively identical driven elevating arc and inverted cam of the coaxial radial direction that is connected on elevating arc and an actuating cam, the output shaft of the coaxial radial direction that is connected on the main shaft opposite; Described inverted cam includes the recess of two symmetries, closes, in the separating brake process slip that contacts of engagement by elevating arc initiatively and driven elevating arc between main shaft, the output shaft and actuating cam and the corresponding recess of inverted cam, realization associating transmission.Also be provided with a reserve insurance buffer unit on actuating cam and the output shaft, this buffer unit is provided with a pin in the middle of being included in actuating cam, the periphery of this pin is provided with rubber sleeve and steel bushing successively, is being provided with a link stopper two recess symmetries middle part on inverted cam on the output shaft.
In the above-mentioned operating mechanism, also be provided with the manual operation interlock between the panel in the described mechanism rack lower right corner and base plate, this manual operation interlock comprises and is arranged on handle hole, damper shaft and connected baffle plate, position switch, interlocking electromagnet and the interlocking pallet of the panel lower right corner over against the motor gear axle, damper shaft is provided with interlock cam and back-moving spring is housed, interlocking electromagnet includes iron core, not during adhesive, iron core blocks interlock cam can not open baffle plate at electromagnet; The interlocking pallet places on the little axle that is contained on panel and the base plate, and back-moving spring is housed, the swing of interlocking pallet is by the pallet control cam control on the main shaft control cam, the taking-up of handle when being used to control manual operation, interlock cam, interlocking electromagnet and iron core thereof, position switch are used to control opening of baffle plate.
Also be provided with another reserve safeties in the above-mentioned operating mechanism, being about to the main shaft prolongation stretches out outside the base plate, and two insurance cams are set thereon control base plate outer insurance travel switch SL4, SL3 respectively, insurance travel switch SL4, SL3 dislocation are stacked, and directly are serially connected with in the electric loop of motor itself.
The utility model has the advantages that: adopted novel gear/cam associating transmission device, it is simple in structure, the part number is few, size is little, multi-functional, power transmission loss is few, efficient is high, and output corner precision height, on/off switch location and keeping is accurately and reliably closed, is not had obvious impulsive force during separating brake, not have other ad hoc buffer unit and keeper, need not to limit the clutch of driving torque, mechanism structure is simplified, size is dwindled, cost reduces.In addition, the utility model setting prevent manually close, interlocking pallet that separating brake mistake not in place is taken out handle also is a kind of simple, new construction reliably.By own simple, the insurance of reserve reliably of transmission device with spacing and buffer structure, the insurance travel switch that installs additional etc., also can prevent locking mechanism unlikely damage motor and mechanism's parts when operate miss that may (but incidence is not high), element fault, remarkable action, guarantee that mechanism can continue operate as normal.Clamping plate type support and all shaft parallels make designs simplification, greatly reduce when processing and assembler.The utlity model has perfect interlocking and anti-misoperation function.
Embodiment
Below in conjunction with drawings and the specific embodiments the utility model is described in further detail.
As shown in Figure 1 and Figure 2, mechanism rack is the clamping plate type structure.The panel 101 of mechanism, base plate 110 are connected and fixed by 4 screw rods 102 and nut 103, the accurate distance that has positioning sleeve 206 to guarantee between two plates between panel, base plate.The part 102a of screw rod 102 outside base plate is the square of overstriking, as the supporting leg of mechanism, is used for mechanism and is connected with the installation of mounting panel.The transmission device of mechanism is loaded between panel 101, the base plate 110.Double-layer wiring terminal board 119 is equipped with on the right side in mechanism, and upside is equipped with two auxiliary switches 115.Terminal board is located at bent plate 111 right sides, and auxiliary switch 115 also will utilize the bent plate 112 at its two ends, is screwed at the mechanism rack upper side by bent plate 111.The termination of mechanism's output shaft 104 extending panels 101 is fixed with indicator board 105.Close, divide display sign on the indicator board, closing a floodgate or the separating brake position, close or divide label to aim at the observation window on the mechanism case, closing or the branch position of observation element and switch easily, Fig. 1 is the separating brake position.Pin on the indicator board is by connecting plate 113, lever 114, connecting plate 116, and connecting lever 117 drives two auxiliary switch actions, switches in the action of the relevant position of combined floodgate or separating brake.The Screw of dress drives counter 109 actions by stainless steel wire and spring on the indicator board 105, whenever closes branch once, and counting increases by 1.Counter is screwed on panel by little mounting panel.The mechanism lower right corner also is provided with the manual operation interlock between panel and base plate, have handle hole 101a on the panel 101, and the handle hole baffle plate 121 that is fixed on damper shaft 122 terminations blocks.
As shown in Figure 2, ball bearing 218 is equipped with at main shaft 106 two ends of mechanism, is contained on panel 101 and the base plate 110 by bearing pedestal 217.The output shaft 104 two ends dress ball bearing 216 of mechanism is contained on panel 101 and the base plate 110 by bearing pedestal 215.The output 104a of output shaft 104 stretches out outside the base plate, and the switch that is used for operating with mechanism is connected and transmission.Be fixed with gear 214, active elevating arc 213, actuating cam 212 with six sides on mechanism's main shaft 106, also be fixed with control cam 205 with flat axle.Be fixed with driven elevating arc 210, inverted cam 209 and block 208 with six sides on the output shaft 104, the axial location positioning sleeve 207,211 of output shaft and parts on shaft also is housed.
As Fig. 3, Fig. 4, shown in Figure 5, be screwed motor 303 on the organization soleplate 110, the fixing transition minor axis 302 of nut is housed, minor axis is equipped with transition gear 301 (needle bearing is housed) outward between the two.Output gear 303a and the gear 214 of 301 whiles of transition gear with motor meshes.One end of the relative panel of output gear shaft 303a of motor is six square toes, and these six square toes are over against handle hole 101a.
During electric switch-on, motor 303 energisings, its output gear 303a rotates counterclockwise (referring to Fig. 4), drives main shaft 106 and rotates counterclockwise through transition gear 301, gear 214.Between main shaft and the output shaft 104 by active elevating arc 213, driven elevating arc 210 and actuating cam 212, inverted cam 209 associating transmissions.The most of corner of output shaft is by gear drive, at 3 °~5 ° corners that start and put in place by cam drive.Close on and close a floodgate when putting in place, the 205a of cam 205 part rotates counterclockwise a nearly circle by Fig. 7 position, promotes 107 actions of SL2 travel switch and disconnects, and contactor and motor cut off the power supply in succession.When motor and main shaft inertia rotate, the combined floodgate that actuating cam is pushed to Fig. 4 with inverted cam and the output shaft position that puts in place.Thereafter, motor and main shaft continuation inertia rotates the stall of consuming energy gradually.When combined floodgate puts in place, the short arc face at inverted cam recess both sides 209a, 209b place, bidirectionally limited by cambered surface corresponding on the actuating cam, output shaft and switch are located and remain on closing position accurately, reliably, the output corner deviation can be in ± 0.5 °.212a is divided in oriented outside bulge, the middle part of actuating cam, and 212a part and inverted cam recess are designed to suitable shape, do not have tangible impulsive force in the startup section of closing (branch) lock and the section of putting in place.
In the hole at actuating cam middle part pin 204 is housed, rubber sleeve 202 and steel bushing 201 is housed on the pin successively, and tightens the restrictive axial displacement with nut 203.The block 208 of above-mentioned part on output shaft constitutes a simple buffer unit.The arc projection 209c of actuating cam middle part projection 212a and both sides, inverted cam middle part constitutes simple and reliable stopping means.Above-mentioned buffering and stopping means are inoperative during regular event, because of improper situations such as electric component fault or operate misses, angle of eccentricity is bigger than normal maybe might to be surpassed when allowing limit, said apparatus has reliable buffering and spacing reserve safety effect, guarantee that mechanism element and motor do not damage under unexpected improper situation yet, mechanism can continue operate as normal.When being combined floodgate, Fig. 5 arrives the schematic diagram of spacing position because of the accidental cause main shaft.
Electronic separating brake course of action is identical with combined floodgate, but each several part switched in opposite (Fig. 3).Because the combined floodgate of driving and driven cam and separating brake side cambered surface and recess are designed to symmetrical structure, driving and driven elevating arc and block 208 are symmetrical structure also, and drive characteristic is also identical with combined floodgate during separating brake.Separating brake closes on and puts in place, promotes 108 switchings of SL1 travel switch by the 205a cam and makes the motor outage.SL1, SL2 switch utilize its mounting panel, are screwed on panel 101.
As shown in Figure 7, the manual operation interlock comprises interlocking electromagnet 704, interlocking pallet 702, control cam 205, interlock cam 705, handle hole baffle plate 121, spring 706,703, position switchs 123 (containing two switches of SP1, SP2) etc. have perfect interlocking and anti-misoperation function.Fixing interlock cam 705 and first back-moving spring 706 is housed on the damper shaft 122, position switch 123 (two switches of SP2, SP1 that comprise closed assembly) is screwed on panel by its mounting panel.Two screw of interlocking electromagnet 704 usefulness are on panel, and screw has cushion cover outward, make interlocking electromagnet leave the position that panel is positioned to be needed.On the little axle 118 the interlocking pallet 702 and second back-moving spring 703 thereof are housed, the swing of interlocking pallet is by the control of the pallet in the control cam 205 that is fixed on main shaft cam 205b control.Interlocking electromagnet 704 and 704a unshakable in one's determination thereof, interlock cam 705, position switch SP1 are used for opening of joystick hole baffle plate 121.When only the state of other all switches that the switch of operating with this mechanism in the power station is relevant, equipment all allows this mechanism and switch motion and control loop that electricity is arranged, flap shutter 121 slightly counterclockwise, interlock cam 705 will promote the SP1 switch motion, cut off electric operating control loop (can not carry out electric operating again), and connection interlocking electromagnet loop, interlocking electromagnet 704a adhesive unshakable in one's determination, get out of the way the rotation path of interlock cam 705, baffle plate 121 could rotate enough angles, opens handle hole 101a insertion handle fully and carries out manual operation.When handle hole is opened, SP2 switch motion, the galvanic circle of the interlocking electromagnet that cut-out can only be switched in short-term.Above device makes between manual operation and electric operating, has realized interlocking between the state of the manual operation of this switch and related switch and equipment, can prevent manual misoperation switch.
Allow under the condition of this switching manipulation at other the relevant switches and the state of equipment, open the handle hole baffle plate as stated above, handle 701 is passed handle hole 101a, the hexagonal hole of handle is enclosed within on six square toes of close panel of output gear shaft 303a of motor, turn to label 120 indicates close or divide to turn to turning handle by being loaded on handle on the panel, just can realize manually closing or dividing operation.Manually close, timesharing, the course of action of mechanism's each several part with electronic close, divide identical.
Referring to Fig. 7, Fig. 8.Interlocking pallet 702 is controlled by pallet control cam 205b, all is in 702a double dot dash line position in combined floodgate or separating brake process, at this moment stops manual operation and can not take off handle.Have only when mechanism and close a floodgate or separating brake when putting in place, the interlocking pallet just lifts the arrival solid line position, can take off handle smoothly.This can prevent that operate miss from stop switch and remaining on the position of closing, dividing midway.This mistake that prevents of the utility model design is taken off the interlock of handle, it is the very reliable very simply again new construction of structure, device than the same effect in a kind of mechanism of the introduction of foreign technology of a large amount of production uses, the part number, size is all little several times, but Position Control is accurate, dependable performance many.
Referring to Fig. 2 and Fig. 6.In the termination that main shaft stretches out base plate, be fixed with insurance cam 219 and insurance cam 220.At plate outer side, with screw SL4 insurance travel switch 221 and SL3 insurance travel switch 222 are installed, SL4, the dislocation of SL3 switch are stacked.Cam 219,220 control switch SL4, SL3 respectively is slightly later to the switching disconnection of travel switch SL2, SL1 action back when combined floodgate or separating brake.SL4, SL3 switch directly are serially connected with in the electric motor loop.During normal running, SL4, SL3 switch are inoperative, and two switch short circuits also can be finished all normal runnings of mechanism.As because of the electric component fault, motor can not cut off the power supply, and motor and main shaft continue energising and rotate, and SL4, SL3 switch will moves directly cut-out electric motor loop, have the reserve safety effect, can avoid burn-out motor.
Electric loop of the present utility model has increased in electric motor loop SL4, the SL3 insurance travel switch except that above-mentioned, and all the other are identical with the custom circuit of a large amount of motor drive mechanisms that use in the GIS equipment, just no longer describe in detail.
The embodiment parts on shaft is fixing with six sides or flat axle, and other modes such as flat key, spline, taper bolt, elastic cylindrical pin of also can using instead are fixed.
The purposes of the utility model design is the operational grounding switch, does not need QA isolating switch but also can be used for operation; Designed use is used for the GIS complete set of equipments of 800kV and 1100kV, but also can be used for operating isolating switch and earthed switch among other low voltage grades or the non-GIS.
The utility model output shaft turns to: close a floodgate clockwise, separating brake is counterclockwise.But the isolating switch and the earthed switch that also can be used for requirement output shaft switched in opposite, promptly mechanism's output shaft turn to into: close a floodgate counterclockwise, separating brake is clockwise.Mechanism only needs following minor variations to get final product: 1. closing on the indicator board 105, minute mark memorial tablet are put and are exchanged; 2. handle turns to the printed words position of closing, divide on the label 120 to exchange (part difference); 3. SL1, SL2 travel switch position are exchanged, and need exchange SL1, the SL2 label of stickup for actual; 4. the positive pole of motor and negative outside wire are exchanged the position of wiring in circuit; 5. the square shaft of two auxiliary switches 115 turn over 90 ° with shoulder bar 114, connecting lever 117 links to each other, and the numbering of often the opening of auxiliary switch, normally closed interlock is remained unchanged.